Numerically computed engine performance of a nominally two-dimensional radical farming scramjet with porous (permeable carbon/carbon ceramic) and porthole fuel injection is presented. Inflow conditions with Mach number, stagnation pressure, and enthalpy of 6.44, 40.2 MPa, and 4.31 MJ / kg , respectively, and fuel/air equivalence ratio of 0.44 were maintained, along with engine geometry. Hydrogen fuel was injected at an axial location of 92.33 mm downstream of the leading edge for each investigated injection method. Results from this study show that porous fuel-injection results in enhanced mixing and combustion compared to porthole fuel injection. This is particularly evident within the first half of the combustion chamber, where porous fuel injection resulted in mixing and combustion efficiencies of 76 and 63%, respectively. At the same location, porthole fuel injection resulted in efficiencies respectively of 58 and 46%. Key mechanisms contributing to the observed improved performance were the formation of an attached oblique fuel-injection shock and associated stronger shock-expansion train ingested by the engine, enhanced spreading of the fuel in all directions, and a more rapidly growing mixing layer.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Porous Versus Porthole Fuel Injection in a Radical Farming Scramjet: Numerical Analysis


    Contributors:

    Published in:

    Publication date :

    2015-05-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    H2-O2 Porous Fuel Injection in a Radical Farming Scramjet

    Capra, Bianca / Lorrain, Philippe / Boyce, Russell et al. | AIAA | 2012


    STREAMWISE PORTHOLE FUEL INJECTION FOR BOUNDARY-LAYER COMBUSTION INSIDE A SCRAMJET ENGINE

    Barth, J.E. / Wheatley, V. / International Council of the Aeronautical Sciences; Optimage Ltd | British Library Conference Proceedings | 2012


    Experimental Investigation of Inlet-Injection Radical-Farming Scramjet Combustion

    Boyce, R.R. / Brieschenk, S. / Lorrain, P. | British Library Conference Proceedings | 2013


    CFD Analysis of Radical Farming Concept Scramjet Engine

    Schloegel, Fabrice / Boyce, Russell | AIAA | 2009